Question
It is not wise to sleep under a tree during night. Why?

Answer

During day, plants photosynthesise in the presence of sunlight and uses $\mathrm{CO}_2$ produced during respiration. During this process $\mathrm{O}_2$ is released as a byproduct and a balance between $\mathrm{O}_2$ and $\mathrm{CO}_2$ is maintained in the atmosphere.
But in the night, plants do not photosynthesise. Plants are unable to use $\mathrm{CO}_2$ during night and produces $\mathrm{CO}_2$ and takes $\mathrm{O}_2$ during respiration.
This leads to the increase in the proportion of $\mathrm{CO}_2$ in the air.
So, if one sleeps under a tree at night, he will have problems in breathing as the amount of $\mathrm{CO}_2$ in the air around will certainly be more than oxygen. Therefore, it is not advisable to sleep under trees during night because the person will suffer from suffocation and feel excess weight on chest.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Draw a diagram of an electric bell. On what principle, does an electric bell work?
Complete the paragraph related to the life history of silk moth. by filling in the blanks: The _____$(a)$______ silk moth lays _____$(b)$____, from which hatch ____$(c)$____ called _____$(d)$____ or ____$(e)$____. They grow in size and when the caterpillar is ready to enter the next stage of its life history called _____$(f)$____, it first weaves a covering to hold itself, which is known as ____$(g)$_____.
Draw a labelled diagram showing the process of photosynthesis.
Visit a forest with your parents by taking permission from the respective authority (forest officials).
(i) Make a list of the things you see in the forest.
(ii) Try to recognise various types of trees and different layers formed by them.
Paheli went to the market to buy sarees for her mother. She took out a thread from the edge of the two sarees shown by the shopkeeper and burnt them. One thread burnt with a smell of burning hair and the other burnt with the smell of burning paper. Which thread is from a pure cotton saree and which one from a pure silk saree? Give reason for your answer.
Differentiate between unisexual flower and bisexual flower$?$
What is a simple pendulum? Explain how does it perform oscillatory motion.
Here is a crossword puzzle: Good luck!
Across
  1. Liquid waste products.
  2. Solid waste extracted in sewage treatment.
  1. A word related to hygiene.
  1. Waste matter discharged from human body.
Down
  1. Used water.
  2. A pipe carrying sewage.
  3. Micro-organisms which causes cholera.
  4. A chemical to disinfect water.
Explain the two mode of nutrition in plants.
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
(a) Do you think rust is different from iron?
(b) Can you change rust back into iron by some simple method?
(c) Do you think formation of rust from iron is a chemical change?
(d) Give two other examples of a similar type of change.